threading fixes

Hyperbar.Windows/Templates/TemplateFactory.cs

@@ -1,19 +1,11 @@
 using Microsoft.Extensions.DependencyInjection;
-using Microsoft.UI.Xaml;
-using Microsoft.UI.Xaml.Controls;
 
 namespace Hyperbar.Windows;
 
-public class TemplateFactory(ITemplateGeneratorFactory factory,
-    IEnumerable<IContentTemplateDescriptor> descriptors,
+public class TemplateFactory(IEnumerable<IContentTemplateDescriptor> descriptors,
     IServiceProvider provider) :
-    DataTemplateSelector,
     ITemplateFactory
 {
-    protected override DataTemplate SelectTemplateCore(object item) => factory.Create();
-
-    protected override DataTemplate SelectTemplateCore(object item, DependencyObject container) => factory.Create();
-
     public object? Create(object key)
     {
         if (descriptors.FirstOrDefault(x => x.Key == key) is IContentTemplateDescriptor descriptor)